| 1. | a treacherous person, esp. one who feigns friendship. |
| 2. | a concealed danger. |

| snake in the grass n. pl. snakes in the grass See snake. |
snake in the grass
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snake in the grass
A treacherous person, as in Ben secretly applied for the same job as his best friend; no one knew he was such a snake in the grass. This metaphor for treachery, alluding to a poisonous snake concealed in tall grass, was used in 37 b.c. by the Roman poet Virgil (latet anguis in herba). It was first recorded in English in 1696 as the title of a book by Charles Leslie.